Drilldown: Patents

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Patents > Inventor country: DE & Related to aircraft : .5? or Yes & Patent agent: None & National tech categories : AT 77d or USPC 416/116

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LTA (10) · airship (9) · propulsion (6) · design (4) · Airplane (4) · navigation (3) · balloon (3) · gas (3) · frame (3) · aerodynamics (2) · hydrogen (2) · stability (2) · propellers (2) · propeller (2) · cooling (2) · control (2) · construction (2) · Whole (2)
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